Look for it as the eclipse starts, it will be a full moon high overhead. You can't miss it (assuming that you can see the sky at all).
At the height of eclipse the moon turns dark reddish because the only thing illuminating it are all the world's sunsets and sunrises at once!
After the eruption of Mt. Pinatubo in the Philippines in mid 1991 pushing more particulates and sulfur into the stratosphere than any eruption since Krakatoa, the following lunar eclipse on 9 December 1992 was so dark the moon completely disappeared, except for observers in truly dark sky sites.
The El Chichón eruption in 1982 also led to a very dark lunar eclipses in July and December of that year (but not as dark as the Pinatubo eclipse).
It shouldn't be a dark eclipse tonight, since there have been no major recent eruptions - but these things are hard to predict.